#define _CRT_SECURE_NO_WARNINGS 1
# include<iostream>
using namespace std;
int main()
{
	int y, m, d, y1, m1, d1;
	cin >> y >> m >> d;
	cin >> y1 >> m1 >> d1;
	if (y1 - y > 0)
		cout << "yes";
	else if (y1 - y == 0)
	{
		if (m1 - m >= 0)
		{
			if (d1 - d >= 0)
			{
				cout << "yes";
			}
			else cout << "no";
		}
		else cout << "no";
	}
	else cout << "no";
	return 0;
}
